Characterization of Y-Ba-Cu-O superconducting thin films prepared by coevaporation of Y, Cu, and BaF2
- 3 April 1989
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 54 (14) , 1365-1367
- https://doi.org/10.1063/1.101402
Abstract
We have studied the effect of varying the postdeposition anneal conditions on the properties of thin films of YBa2Cu3O7 prepared by coevaporation from Y, Cu, and BaF2. The temperature of this processing step determines both the microstructure of the films and the constituent phases. At low temperatures, BaF2 is incompletely reacted and the predominant superconducting phase is Y2Ba4Cu8O20−x. At higher temperatures, the equilibrium distribution of phases, which includes YBa2Cu3O7, is formed. As the temperature is raised, the texture of the films also changes. The thermodynamics of the formation reaction and of the reaction between YBa2Cu3O7 and various substrate materials is discussed.Keywords
This publication has 7 references indexed in Scilit:
- Oxygen stoichiometry in Ba2YCu3OxPublished by Elsevier ,2003
- High-energy elastic backscattering of helium ions for compositional analysis of high-temperature superconductor thin filmsApplied Physics Letters, 1988
- Ordered-defect structure in epitaxialthin filmsPhysical Review B, 1988
- Reproducible technique for fabrication of thin films of high transition temperature superconductorsApplied Physics Letters, 1987
- Thermochemistry and High Temperature Thermodynamic Properties of Rare Earth-Alkaline Earth-Copper Oxide SuperconductorsMRS Proceedings, 1987
- An electrochemical study of high-temperature stability of compounds between the rare earths and copper oxideJournal of Solid State Chemistry, 1976
- Phase Equilibria in the System BaTiO3–SrTiO3Journal of the American Ceramic Society, 1957